., the obama administration, nato obviously very concerned about the regime of the president potentially using chemical weapons, poison gas, against its own people. here's the question. what's the difference killing civilians in syria with bombs from mig jet fighters or attack helicopters as opposed to let's say poison gas? or chemical warfare? >> well, that's a good question. in one sense, in moral terms, there is no difference. almost 40,000 people have died in syria already. but the use of chemical weapons and poison gas, i think the fa val valueties would be very much greater. it does kind of cross a line. these aren't judgments that you can make in any particularly scientific way. but i think what your administration, part of the international community is signaling to the president is if you cross that line, it will be a sharp and strong reaction. >> and those were tough words coming from president obama yesterday from secretary hillary clinton from the nato secretary general today in brussels. is that enough to prevent using poison gas or chemical warfare? or just threats, shall w